JP2008248835A - Pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump, of which the whole length is set to be small and the good fluid suction/discharge performance is secured. <P>SOLUTION: The pump has a diaphragm 9 disposed in a pump chamber 12, and an actuator having a drive member 1b driving the diaphragm 9 and a shaft 1a operating the drive member 1b. Fluid is sucked into the pump chamber 12, and is discharged from the pump chamber 12 by the drive of the diaphragm 9. The pump is constituted of: a suction passage 3a guiding the fluid into the pump chamber 12 and a discharge passage 3b guiding the fluid in the pump chamber 12 to the outside, which are extended in a direction orthogonal to a movement direction of the shaft 1a of the actuator 1; and valve elements disposed to be relative to each of the intake passage 3a and the discharge passage 3b, that is, a first check valve 6 and a second check valve 7. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a pump that includes a driveable diaphragm in a pump chamber and is suitable for an electronic device pump or a fuel supply pump.

  As this type of prior art, there is one disclosed in Patent Document 1, for example. The prior art disclosed in Patent Document 1 includes a pump chamber, a diaphragm that is disposed in the pump chamber and that has two ends positioned on opposite sides, and a drive member that drives the diaphragm. Yes. The drive member is formed at the tip of the shaft of the actuator that constitutes the magnetic field drive mechanism. Each of the actuators includes a suction nozzle, that is, a suction path, and a discharge nozzle, that is, a discharge path that extends in the same direction as the axis of movement of the actuator and communicates with the pump chamber, and is provided between the suction path and the pump chamber. A first check valve that allows the suction of fluid from the suction path to the pump chamber, and a second check valve that is provided between the pump chamber and the discharge path and allows the discharge of fluid from the pump chamber to the discharge path. And a valve. Note that the two end portions of the above-described diaphragm located on opposite sides are held in a direction perpendicular to the moving direction of the actuator shaft.

In this prior art, the diaphragm is driven by the movement of the shaft of the actuator, so that the suction path, the suction of fluid into the pump chamber via the first check valve, and the pump via the second check valve and the discharge path are performed. The fluid can be discharged from the chamber.
JP 2005-325780 A

  In the above-described prior art, the suction path and the first check valve provided in relation to the suction path, the discharge path, and the second check valve provided in relation to the discharge path, Since each is configured to extend in the same direction as the movement direction of the axis of the actuator, the overall length dimension becomes large, and it is difficult to realize downsizing in the length direction that has been recently requested. If the overall length dimension is set to be too small, the movable range of the diaphragm is limited, which adversely affects the fluid suction and discharge performance.

  The present invention has been made from the above-described actual state of the prior art, and an object of the present invention is to provide a pump capable of setting the overall length dimension to be small and ensuring good fluid suction / discharge performance.

  In order to achieve the above object, the present invention comprises a pump chamber, a diaphragm disposed in the pump chamber, a drive member for driving the diaphragm, and an actuator having a shaft for operating the drive member, The diaphragm is driven to suck the fluid into the pump chamber and discharge the fluid from the pump chamber, and is extended in a direction perpendicular to the moving direction of the shaft of the actuator, and the fluid is supplied to the pump chamber. And a discharge path for guiding the fluid in the pump chamber to the outside, and a valve body provided in association with each of the suction path and the discharge path.

  In the present invention configured as described above, the diaphragm is driven via the drive member by the movement of the shaft of the actuator, and the fluid is sucked into the pump chamber via the suction path and the valve body provided in association with the suction path. In addition, the fluid in the pump chamber is guided to the outside through the valve body provided in association with the discharge path and the discharge path. That is, fluid can be sucked and discharged.

  In addition, since the suction path that guides the fluid to the pump chamber and the discharge path that guides the fluid in the pump chamber to the outside extend in the direction perpendicular to the direction of movement of the actuator shaft, the entire path along the direction of movement of the actuator shaft The dimension in the length direction, that is, the entire length dimension can be set small without restricting the movable range of the diaphragm. That is, the overall length dimension can be set small, and good fluid suction / discharge performance can be ensured.

  Further, the present invention is characterized in that, in the above invention, the driving member and the main part of the diaphragm are arranged so as to be biased to one side around the axis of the actuator.

  In the present invention configured as described above, the drive member and the main part of the diaphragm are arranged on one side with the axis of the actuator as the center, and the suction path and the discharge path are centered on the axis of the actuator. It can be arranged biased to the side.

  According to the present invention, in the above invention, the valve body includes a first check valve that opens and closes the suction passage, and a second check valve provided between the pump chamber and the discharge passage. It is a feature.

  In the present invention configured as above, suction of fluid into the pump chamber is permitted by the first check valve, and discharge of fluid in the pump chamber is permitted by the second check valve. In other words, fluid can be accurately sucked into and discharged from the pump chamber through these first check valve and second check valve without causing fluid leakage.

  According to the present invention, in the above invention, each of the first check valve and the second check valve is connected to a movable umbrella portion and a direction orthogonal to the expanding direction of the umbrella portion. A shaft portion, and the shaft portion of the first check valve extends in a direction perpendicular to the direction of movement of the shaft of the actuator in parallel with the suction path, and the second check valve The shaft portion extends in an oblique direction with respect to the moving direction of the shaft of the actuator.

  In the present invention configured as described above, the length of the shaft portion of the first check valve can be set to a length substantially equal to the length of the suction path, for example, and stable holding of the first check valve can be realized. In addition, the shaft portion of the second check valve extends obliquely with respect to the direction of movement of the shaft of the actuator, and the umbrella portion extends in a direction perpendicular to the shaft portion. The umbrella portion of the second check valve is also extended obliquely with respect to the moving direction of the actuator shaft. Thereby, the height dimension of the 2nd non-return valve in the height direction which is a direction orthogonal to the moving direction of the axis | shaft of an actuator can be set small.

  According to the present invention, there is provided a valve holder that holds the second check valve and forms the pump chamber in the above invention, and the valve holder extends in a direction orthogonal to the moving direction of the shaft of the actuator. A first flow path that communicates the suction path and the pump chamber via the first check valve, and extends in an oblique direction with respect to the movement direction of the shaft of the actuator, and the second reverse The second check valve is provided so as to be able to open and close the second flow path of the valve holder, the second flow path communicating the discharge path and the pump chamber via a stop valve. It is said.

  The present invention configured as described above can realize stable holding of the second check valve by the valve holder. The fluid sucked from the suction passage is guided to the pump chamber via the first check valve and the first flow path of the valve holder, and the fluid in the pump chamber is the second flow path and the second check flow of the valve holder. It is guided to the outside through a valve and a discharge path, and fluid can be sucked and discharged with high accuracy.

  According to the present invention, in the above invention, the valve holder is disposed at a position away from the suction passage and at a position close to the suction passage and spaced from the first flat plate portion. The second flat plate portion, the shaft portion of the second check valve is held, and has an inclined portion that connects the first flat plate portion and the second flat plate portion. A case is formed in the second flat plate portion, the second flow path is formed in the inclined portion, the suction passage and the discharge passage are formed, and the shaft portion of the first check valve is held. The umbrella portion of the first check valve has a flat portion that contacts the second flat plate portion of the valve holder, and the umbrella portion of the second check valve has a flat portion that contacts the case. It is characterized by that.

  In the present invention configured as above, the second flat plate of the valve holder is arranged by arranging the valve holder so that the second flat plate portion of the valve holder abuts on the flat portion of the first check valve held by the case. The first check valve can be held between the portion and the case, and stable holding of the first check valve can be realized. Further, the second check valve is sandwiched between the inclined portion of the valve holder and the case by arranging the valve holder so that the flat portion of the second check valve held by the inclined portion of the valve holder contacts the case. Thus, stable holding of the second check valve can be realized. That is, stable holding of the first check valve and the second check valve can be realized via the valve holder and the case.

  Further, the present invention is the above invention, wherein the diaphragm has two end portions located on opposite sides, which are held when the diaphragm is disposed in the pump chamber, and one of these two end portions is provided. The diaphragm is provided so that an imaginary line connecting a first end which is an end and a second end which is the other end is inclined with respect to the moving direction of the shaft of the actuator. It is said.

  In the present invention configured as described above, the length of the imaginary line connecting the first end and the second end of the diaphragm is set, for example, the virtual end connecting the first end and the second end which are the holding ends of the conventional diaphragm. By setting it equal to the length of the line, a surface area equivalent to that of the conventional diaphragm described above can be secured. Further, the imaginary line connecting the first end portion and the second end portion of the diaphragm of the present invention forms a state inclined with respect to the moving direction of the axis of the actuator, so that the first end portion and the second end portion are connected to each other. Even when the length of the connecting virtual line is the same as the length of the virtual line connecting the first end and the second end of the conventional diaphragm described above, it is a dimension in a direction orthogonal to the moving direction of the axis of the actuator. The height dimension can be reduced. Thus, according to the present invention, the height dimension of the diaphragm can be set small, and the surface area and movable range of the diaphragm can be increased. Thereby, although a height dimension can be set small, the capacity | capacitance change of a pump chamber can be enlarged.

  According to the present invention, in the above invention, the drive member is formed integrally with the shaft of the actuator. In the present invention configured as described above, the number of parts can be reduced because the shaft of the actuator and the drive member are formed of a single member.

  Further, the present invention is characterized in that, in the above invention, the pump chamber is formed and a diaphragm holder in which the diaphragm is accommodated is provided, and a hole portion in which the driving member is movably inserted is provided in the diaphragm holder. . According to the present invention configured as described above, the diaphragm can be stably held by the diaphragm holder, and the diaphragm can be reliably driven by moving the driving member through the hole of the diaphragm holder.

  The present invention extends in a direction perpendicular to the direction of movement of the axis of the actuator, and draws a fluid into the pump chamber, a discharge channel that leads the fluid in the pump chamber to the outside, and the suction channel and the discharge channel. Since the valve body provided in association with each is provided, the overall length dimension along the moving direction of the shaft of the actuator can be set small without restricting the movable range of the diaphragm. That is, the overall length dimension can be set small, good fluid suction / discharge performance can be ensured, and overall downsizing, which has been a request from the past, can be realized without reducing the fluid suction / discharge performance.

  Hereinafter, the best mode for carrying out a pump according to the present invention will be described with reference to the drawings.

[Configuration of this embodiment]
FIG. 1 is an exploded perspective view showing an embodiment of a pump according to the present invention, FIG. 2 is an assembly view of this embodiment, (a) is a plan view, (b) is an A- in FIG. It is A sectional drawing.

  The pump according to the present embodiment includes an actuator 1 that constitutes a magnetic field drive mechanism unit, and a pump body 2 that is connected to the actuator 1. As shown in FIGS. 1 and 2, the actuator 1 includes a shaft 1 a that can be moved by energization, and a drive member 1 b that is formed integrally with the shaft 1 a, for example. The drive member 1b is provided to be eccentric from the axis of the shaft 1a, that is, from the center line 14 shown in FIG. 2B.

  As shown in FIG. 1, the pump main body 2 includes a lower case 3 constituting a housing, an upper case 4 fitted into the lower case 3, a packing 5 disposed in the lower case 3, and the packing 5 A valve holder 8 disposed above, a first check valve 6 and a second check valve 7 disposed between the valve holder 8 and the lower case 3, and a diaphragm holder disposed on the valve holder 8 10 and a diaphragm 9 made of an elastic member such as rubber housed in the diaphragm holder 10.

  As shown in FIG. 2B, the lower case 3 extends in a direction orthogonal to the moving direction of the shaft 1 a of the actuator 1, and draws a fluid into the pump chamber 12, and the pump chamber 12 And a discharge passage 3b for guiding the fluid to the outside. Moreover, as shown in FIG. 1, the attachment part 3d which adapts to the some attachment part 4a of the upper case 4 is provided. Screws or the like are inserted into these attachment portions 3d and 4a, whereby the pump body 2 including the lower case 3 and the upper case 4 is fixed at a predetermined installation location (not shown).

  3A and 3B are views showing a valve holder provided in the present embodiment. FIG. 3A is a perspective view, FIG. 3B is a plan view, FIG. 3C is a side view, and FIG. 1A and 1B are views showing a first check valve and a second check valve, wherein FIG. 1A is a perspective view seen from above, FIG. 2B is a perspective view seen from below, FIG. 1C is a plan view, and FIG. The figure is a side view.

  As shown in FIG. 3 and FIG. 2B, the valve holder 8 extends in a direction orthogonal to the moving direction of the shaft 1a of the actuator 1 and is connected to the suction passage through the first check valve 6. The first flow path 8d that communicates the 3a and the pump chamber 12 and extends obliquely with respect to the moving direction of the shaft 1a of the actuator 1, and the discharge passage 3b and the pump chamber 12 via the second check valve 7. And a second flow path 8e that communicates with each other. The second check valve 7 is provided so that the second flow path 8e of the valve holder 8 can be opened and closed. The first check valve 6 is provided so that the suction passage 3a of the lower case 3 can be opened and closed.

  As shown in FIG. 4 and FIG. 2B, the first check valve 6 and the second check valve 7 are formed of an elastic member such as rubber having the same shape and dimension, and the suction passage 3a and The valve body provided in relation to each of the discharge path 3b is comprised. The first check valve 6 and the second check valve 7 are movable, that is, elastically deformable umbrella parts 6a and 7a, and are connected in a direction orthogonal to the expanding direction of these umbrella parts 6a and 7a. It has shaft parts 6b and 7b. As shown in FIG. 2 (b), the shaft portion 6b of the first check valve 6 is inserted into a hole 3c formed in the lower case 3, and the shaft 1a of the actuator 1 moves in parallel with the suction passage 3a. It extends in a direction orthogonal to the direction. The shaft portion 6b of the first check valve 6 is set to, for example, substantially the same length as the hole portion 3c and is held by the hole portion 3c. The shaft portion 7 b of the second check valve 7 extends in an oblique direction with respect to the moving direction of the shaft portion 1 a of the actuator 1.

  As shown also in FIG. 3, the valve holder 8 described above is located at a position away from the suction path 3a, that is, a first flat plate portion 8a disposed in the vicinity of the discharge path 3b, and a position near the suction path 3a. The first flat plate portion 8a has a second flat plate portion 8b spaced apart from the first flat plate portion 8a and a hole portion 8f into which the shaft portion 7b of the second check valve 7 is inserted and held. 2 is provided with an inclined portion 8c connecting the flat plate portion 8b. The first flow path 8d that connects the suction passage 3a and the pump chamber 12 is formed in the second flat plate portion 8b, and the second flow path 8e that connects the discharge passage 3b and the pump chamber 12 is the inclined portion 8c. Is formed. The shaft portion 7b of the second check valve 7 is inserted into a hole portion 8f provided in parallel with the second flow path 8e. For example, the shaft portion 7b is set to have substantially the same length as the hole portion 8f. Held by 3f.

  As shown in FIG. 4, the umbrella portion 6 a of the first check valve 6 has a flat portion 6 c that contacts the second flat plate portion 8 b of the valve holder 8, and the umbrella portion 7 a of the second check valve 7 is It has the flat part 7c contact | abutted to the inclined surface 3f of the lower case 3 shown to the (b) figure of FIG. That is, the second flat plate portion 8b of the valve holder 8 is in contact with the flat portion 6c of the first check valve 6 held by the lower case 3, and the second flat portion held by the inclined portion 8c of the valve holder 8 is used. The valve holder 8 is arranged so that the flat portion 7 c of the check valve 7 contacts the inclined surface 3 f of the lower case 3. As shown in FIG. 2B, the skirt portion of the umbrella portion 6a of the first check valve 6 is brought into contact with the flat surface 3e of the lower case 3, and the umbrella portion 7a of the second check valve 7 is contacted. Is in contact with the inclined portion 8 c of the valve holder 8.

  As shown in FIG. 2B, the diaphragm 9 provided in the present embodiment is disposed in the pump chamber 12 and has a first end 9d out of two ends located on opposite sides of each other, An imaginary line 13 that connects the second end portion 9e that is provided apart from the first end portion 9d is provided so as to be inclined with respect to the moving direction of the shaft portion 1a of the actuator 1.

  5A and 5B are diagrams showing a diaphragm provided in the present embodiment, wherein FIG. 5A is a perspective view seen from above, FIG. 5B is a perspective view seen from below, FIG. 5C is a plan view, and FIG. The figure is a side view, (e) is a sectional view taken along line BB in (c), FIG. 6 is a diagram showing a diaphragm holder provided in the present embodiment, (a) is a perspective view seen from above, ( (b) The figure is the perspective view seen from the lower part, (c) The figure is a top view (d) The figure is a side view, (e) The figure is a front view.

  As shown in FIGS. 5B, 5D, and 5E, the diaphragm 9 includes an engaging portion 9f6 that engages with the driving member 1b of the actuator 1, for example, a hole portion, and the engaging portion 9f6. And an elastically deformable portion. As shown in FIG. 5 (e), the diaphragm 9 has a shape of one portion of the elastically deforming portion sandwiching the engaging portion 9f6 passing through the center line 14, that is, the shape of the upper portion in the drawing, and the shape of the other portion, that is, the lower portion. Are formed in different overall shapes.

  Further, as shown in FIG. 5, the diaphragm 9 includes a first flat plate portion 9a that forms the first end portion 9d, a second flat plate portion 9b that forms the second end portion 9e, and the first of these. It has an inclined portion 9c that connects the flat plate portion 9a and the second flat plate portion 9b, and a box-shaped portion 9f that is formed in the inclined portion 9c and includes the engaging portion 9f6 described above.

  The elastic deformation part mentioned above consists of the inclined part 9c, the box-shaped part 9f formed in this inclined part 9c, a part of 1st flat plate part 9a, and a part of 2nd flat plate part 9b. The first end portion 9d described above is composed of a portion excluding the above-mentioned part of the first flat plate portion 9a, and the above-described second end portion 9e is the above-mentioned part of the second flat plate portion 9b. Consists of the removed parts.

  Further, as shown in FIGS. 5B, 5C, and 5D, the inclined portions 9c described above are arranged on both side portions of the box-shaped portion 9f, and are set to have the same width dimension. It consists of a first inclined portion 9c1 and a second inclined portion 9c2.

  The box-shaped portion 9f described above includes a first surface portion 9f1 that is continuous with the first flat plate portion 9a, and a second surface portion 9f2 that is continuous with the first surface portion 9f1 and is continuous with the first inclined portion 9c1. The third surface portion 9f3 connected to the first surface portion 9f1 and connected to the second inclined portion 9c2, and the first surface portion 9f1, the second surface portion 9f2, the third surface portion 9f3, and the second flat plate portion 9b. And a fourth surface portion 9f4 provided. Further, as shown in FIGS. 5B and 5E, the box-shaped portion 9f is a space portion surrounded by the first surface portion 9f1, the second surface portion 9f2, the third surface portion 9f3, and the fourth surface portion 9f4. 9f5.

  As shown in FIG. 6, the diaphragm holder 10 in which the diaphragm 9 is accommodated is formed in a frame shape having a basic shape having a base portion 10a and side walls 10b and 10c extending on both sides of the base portion 10a. A hole 10a1 into which the drive member 1b of the actuator 1 is movably inserted is formed in the base 10a. Further, an attachment portion 10d is provided that is connected to the base portion 10a and to which the actuator 1 is attached. Further, as shown in FIG. 6B, the second end 9e formed on the second flat plate portion 9b of the diaphragm 9 is accommodated at the lower ends of the base portion 10a and the side walls 10b, 10c. Step portions 10a2, 10b1, and 10c1 that form void portions are formed.

  7A and 7B are views showing the packing provided in the present embodiment, wherein FIG. 7A is a perspective view, FIG. 7B is a plan view, and FIG. 7C is a front view. As shown in FIG. 7, the packing 5 described above is provided in the vicinity of the first frame portion 5 a disposed in the vicinity of the discharge path 3 b formed in the lower case 3 and the suction path 3 a formed in the lower case 3. A second frame portion 5b to be arranged and an inclined portion 5c connecting the first frame portion 5a and the second frame portion 5b are provided. The space surrounded by the first frame portion 5a described above forms a chamber 5a1 for communicating the discharge passage 3b formed in the lower case 3 and the second flow passage 8e of the valve holder 8, and the second frame portion 5b The enclosed space forms a room 5b1 that allows the suction passage 3a formed in the lower case 3 and the first flow passage 8d of the valve holder 8 to communicate with each other.

  Further, as shown in FIG. 2B, the drive member 1b is inserted into an engaging portion 9f6 formed of a hole portion of the diaphragm 9, and has a tip portion 1b1 having a screw portion. With the leading end 1b1 of the driving member 1b inserted into the engaging portion 9f6 of the diaphragm 9, the locking tool 11 is screwed into the leading end 1b1, and the locking tool 11 and the leading end of the driving member 1b The diaphragm 9 is clamped by 1b1. Thereby, the diaphragm 9 and the drive member 1b are fixed integrally.

  Further, in the present embodiment, as shown in FIG. 2B, the drive member 1b and the main part of the diaphragm 9 are on one side, that is, illustrated with a center line 14 passing through the shaft part 1a of the actuator 1 as a boundary. It is arranged so as to be biased upward. Accordingly, the first check valve 6 attached to the lower case 3 and the main portions of the suction path 3a and the discharge path 3b formed in the lower case 3 are passed through the axis 1a of the actuator 1. The line 14 is deviated toward the other side, ie, the lower side in the figure, with the line 14 as a boundary.

  Further, as shown in FIG. 2B and the like, in the present embodiment, the packing 5 is disposed at the lowermost stage with the first check valve 6 mounted in the lower case 3. A valve holder 8 is arranged with the second check valve 7 mounted thereon, a diaphragm holder 10 containing a diaphragm 9 is arranged on the valve holder 8, and an upper case 4 is arranged thereon. The upper case 4 is fitted to the lower case 3.

  When the valve holder 8 to which the second check valve 7 is attached is disposed in the lower case 3 with the first check valve 6 attached to the lower case 3 as described above, the second flat plate of the valve holder 8 is arranged. By pressing the portion 8 b against the flat portion 6 c of the first check valve 6, the first check valve 6 is held while being sandwiched between the lower case 3 and the valve holder 8. At this time, the flat portion 7 c of the second check valve 7 held by the inclined portion 8 c of the valve holder 8 is pressed against the inclined surface 3 f of the lower case 3, so that the second check valve 7 is moved to the lower case 3. And the valve holder 8. That is, the first check valve 6 and the second check valve 7 are held in a stable state sandwiched between the lower case 3 and the valve holder 8.

  Further, as shown in FIG. 2B, the packing 5 disposed between the lower case 3 and the valve holder 8 mainly has the first frame portion 5 a of the lower case 3 and the valve holder 8. The joint portion between the first flat plate portion 8 a is sealed, and the second frame portion 5 b seals the joint portion between the lower case 3 and the second flat plate portion 8 b of the valve holder 8.

  The diaphragm 9 also has a sealing function. As shown in FIG. 2B, the first end portion 9d formed on the first flat plate portion 9a of the diaphragm 9 is connected to the lower case 3 and the upper case 3. The joint between the case 4 and the joint between the lower case 3 and the first flat plate portion 8a of the valve holder 8 are sealed, and the second end 9e formed on the second flat plate portion 9b of the diaphragm 9 is The joint between the case 3 and the second flat plate portion 8b of the valve holder 8 and the joint between the lower case 3 and the diaphragm holder 10 are sealed.

[Operation of this embodiment]
FIG. 8 is a diagram showing an inhalation process performed in the present embodiment, where FIG. 8A is a plan view, FIG. 8B is a cross-sectional view taken along the line CC in FIG. 9A, and FIG. 9 is performed in the present embodiment. (A) is a plan view, (b) is a sectional view taken on line DD in FIG.

  2B shows the neutral state. When the actuator 1 is energized in this neutral state, for example, as shown in FIG. 8, the shaft portion 1a of the actuator 1 is moved to the arrow 20 in FIG. Move to the right in the figure. Along with this, the drive member 1b also moves in the direction of the arrow 20, and the diaphragm 9 is driven by this drive member 1b so as to greatly change the capacity of the pump chamber 12. That is, it is elastically deformed so as to expand around the virtual line 13 shown in FIG. Due to the increase in the capacity of the pump chamber 12, the pressure in the pump chamber 12 becomes lower than the pressure in the suction passage 3 a of the lower case 3, and the fluid flowing into the suction passage 3 a passes through the umbrella portion 6 a of the first check valve 6. It pushes open and is guided to the chamber 5b1 formed by the second frame portion 5b of the packing 5. Further, the air is sucked from the chamber 5 b 1 into the pump chamber 12 through the first flow path 8 d of the valve holder 8. In this manner, the pump suction process is performed.

  Further, when a current opposite to that described above is passed through the actuator 1 after the suction step thus performed is completed, the shaft 1a of the actuator 1 is shown by an arrow 21 in FIG. 9 as shown in FIG. Move to the left. Along with this, the drive member 1b also moves in the direction of the arrow 21, and the diaphragm 9 is driven by this drive member 1b so as to change the capacity of the pump chamber 12 small. That is, it is elastically deformed so that it contracts around the virtual line 13 shown in FIG. Due to the decrease in the capacity of the pump chamber 12, the pressure in the pump chamber 12 becomes higher than the pressure in the discharge passage 3 b, and the fluid in the pump chamber 12 passes through the second flow path 8 e of the valve holder 8 to the second check. The umbrella portion 7 a of the valve 7 is pushed open and guided to the chamber 5 a 1 formed by the first frame portion 5 a of the packing 5. Further, it is led from the room 5a1 to a discharge path 3b formed in the lower case 3, and discharged from the discharge path 3b to the outside of the lower case 3. In this way, the pump discharge process is performed.

  In the present embodiment, the above-described pump suction and discharge steps are repeated, and the fluid sucked from the suction side is discharged to the discharge side. That is, good fluid suction / discharge performance is ensured.

[Effect of this embodiment]
According to the present embodiment configured as described above, the length of the imaginary line 13 connecting the first end 9d and the second end 9e of the diaphragm 9 is set to, for example, the first end that is the holding end of the conventional diaphragm. By setting it equal to the length of the imaginary line connecting the second end portion, a surface area equal to or greater than that of the conventional diaphragm can be secured. In addition, since the imaginary line 13 connecting the first end 9d and the second end 9e of the diaphragm 9 of the present embodiment forms a state inclined with respect to the moving direction of the shaft 1a of the actuator 1, these first lines Even when the length of the imaginary line 13 connecting the end portion 9d and the second end portion 9e is the same as the length of the imaginary line connecting the first end portion and the second end portion of the conventional diaphragm, the axis 1a of the actuator 1 is used. The height dimension, which is the dimension in the direction orthogonal to the moving direction, can be reduced. Thus, in this embodiment, the height dimension of the diaphragm 9 can be set small, and the surface area and the movable range of the diaphragm 9 can be increased. Thereby, although the height dimension can be reduced, the capacity change of the pump chamber 12 can be increased. That is, it is possible to ensure good fluid suction / discharge performance and to realize a reduction in the overall size.

  Further, as shown in FIG. 5 (e), the shape of one part of the elastically deforming part including the box-like part 9f sandwiching the engaging part 9f6 of the diaphragm 9 is different from the shape of the other part. Elastic deformation including the box-shaped portion 9f of the diaphragm 9 via the engaging portion 9f6 following the moving direction of the shaft 1a of the actuator 1 and via one and other portions of the elastic deforming portions having different shapes. The part can be reliably deformed.

  In addition, the diaphragm 9 includes a box-shaped portion 9f having a first surface portion 9f1, a second surface portion 9f2, a third surface portion 9f3, a fourth surface portion 9f4, and a space portion 9f5. The surface area of 9 and the movable range can be further increased, and when the capacity change of the pump chamber 12 is set to be equal to that of the conventional diaphragm, the height dimension can be further reduced, thereby realizing further miniaturization. To contribute.

  In addition, the inclined portions 9c of the diaphragm 9 are arranged on both side portions of the box-shaped portion 9f, and are configured of a first inclined portion 9c1 and a second inclined portion 9c2 that are set to have the same width dimension. Therefore, the force applied from the driving member 1b to the box-like portion 9f and the inclined portion 9c of the diaphragm 9 with the movement of the shaft 1a of the actuator 1 is averaged, whereby the first inclined portion 9c1, the box-like portion 9f, The second inclined portion 9c2 can be elastically deformed without causing torsion, which contributes to ensuring highly accurate fluid suction and discharge performance.

  In addition, since the box-shaped portion 9f of the diaphragm 9 has the space portion 9f5 together with the first surface portions 9f1 to 9f4, the box-shaped portion 9f can be easily deformed via the space portion 9f5, and also in this respect Contributes to securing high fluid suction and discharge performance.

  Further, according to the present embodiment, the suction path 3a that extends in a direction orthogonal to the moving direction of the shaft 1a of the actuator 1 and guides the fluid to the pump chamber 12, and the discharge path that guides the fluid in the pump chamber 12 to the outside. 3b, and a valve body including a first check valve 6 and a second check valve 7 provided in association with each of the suction passage 3a and the discharge passage 3b, the movement of the shaft 1a of the actuator 1 is provided. The overall length dimension along the direction, that is, the overall length dimension can be set small without restricting the movable range of the diaphragm 9. That is, the overall length dimension can be set small, good fluid suction / discharge performance can be ensured, and the entire size can be reduced without reducing the fluid suction / discharge performance.

  Further, as shown in FIG. 2B, the driving member 1b provided integrally with the shaft portion 1a of the actuator 1 and the main portion of the diaphragm 9 are centered on the shaft portion 1a of the actuator 1, that is, the same. Since the center line 14 shown in FIG. 2B is centered on one side, the suction path 3a and the discharge path 3b are centered on the center line 14 and the other side as described above. Can be arranged so as to be biased to each other, thereby realizing a compact overall structure.

  Further, since the valve body provided in association with each of the suction passage 3a and the discharge passage 3b is composed of the first check valve 6 and the second check valve 7, the first check valve 6 and the second check valve 6 Through the check valve 7, the fluid can be accurately sucked into and discharged from the pump chamber 12 without causing fluid leakage, thereby obtaining high reliability.

  Further, as described above, the flat portion 6 c that contacts the second flat plate portion 8 b of the valve holder 8 is provided on the umbrella portion 6 a of the first check valve 6, and the lower case 3 is provided on the umbrella portion 7 a of the second check valve 7. Since the flat portion 7c that comes into contact with the inclined surface 3f is provided, the first check valve 6 and the second check valve 7 can be stably held via the valve holder 8 and the lower case 3. A highly reliable pump can be obtained.

  Further, since the driving member 1b for driving the diaphragm 9 is formed integrally with the shaft portion 1a of the actuator 1, the number of parts can be reduced, thereby reducing the manufacturing cost. In addition, when it is not necessary to consider the increase in the number of parts, the driving member 1b and the shaft portion 1a of the actuator 1 can be configured by separate members.

  Moreover, since the hole 10a1 into which the drive member 1b which drives the diaphragm 9 is movably inserted is provided in the base 10a of the diaphragm holder 10 in which the diaphragm 9 is accommodated, the diaphragm 9 is stabilized by the diaphragm holder 10. The diaphragm 9 can be reliably driven by moving the driving member 1b through the hole 10a1 of the diaphragm holder 10, and a highly reliable pump can be obtained in this respect as well.

  In addition, since the packing 5 is provided between the lower case 3 and the valve holder 8 and the diaphragm 9 also has a sealing function, a highly accurate sealing structure including the pump chamber 12 can be realized, and fluid leakage is ensured. Can be prevented.

It is an exploded perspective view showing one embodiment of a pump concerning the present invention. The assembly drawing of this embodiment is shown, (a) figure is a top view, (b) figure is AA sectional drawing of (a) figure. It is a figure which shows the valve holder with which this embodiment is equipped, (a) A figure is a perspective view, (b) A figure is a top view, (c) A figure is a side view. It is a figure which shows the 1st check valve and 2nd check valve with which this embodiment is equipped, (a) A figure is a perspective view seen from the upper part, (b) A figure is a perspective view seen from the lower part, (c) Figure Is a plan view, and (d) is a side view. It is a figure which shows the diaphragm with which this embodiment is equipped, (a) A figure is a perspective view seen from the top, (b) A figure is a perspective view seen from the bottom, (c) A figure is a top view, (d) A figure is a side view The figure and (e) figure are BB sectional drawings of (c) figure. It is a figure which shows the diaphragm holder with which this embodiment is equipped, (a) A figure is a perspective view seen from the upper part, (b) A figure is a perspective view seen from the lower part, (c) A figure is a top view (d) A figure is a side view Figures (e) and (e) are front views. It is a figure which shows the packing with which this embodiment is equipped, (a) A figure is a perspective view, (b) A figure is a top view, (c) A figure is a front view. It is a figure which shows the suction | inhalation process implemented by this embodiment, (a) A figure is a top view, (b) A figure is CC sectional drawing of (a) figure. It is a figure which shows the discharge process implemented by this embodiment, (a) A figure is a top view, (b) A figure is DD sectional drawing of (a) figure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Actuator 1a Shaft 1b Drive member 1b1 Tip part 2 Pump main body 3 Lower case 3a Intake path 3b Discharge path 3c Hole part 3e Flat surface 3f Inclined surface 5 Packing 5a 1st frame part 5b 2nd frame part 5c Inclined part 5d Inclined part 6 1st check valve 6a Umbrella part 6b Shaft part 6c Flat part 7 2nd check valve 7a Umbrella part 7b Shaft part 7c Flat part 8 Valve holder 8a 1st flat plate part 8b 2nd flat plate part 8c Inclined part 8d 1st flow path 8e 2nd flow path 8f Hole 9 Diaphragm 9a 1st flat plate part (elastic deformation part)
9b 2nd flat plate part (elastic deformation part)
9c Inclined part (elastically deformed part)
9c1 1st inclination part 9c2 2nd inclination part 9d 1st edge part 9e 2nd edge part 9f Box-shaped part (elastic deformation part)
9f1 First surface portion 9f2 Second surface portion 9f3 Third surface portion 9f4 Fourth surface portion 9f5 Space portion 9f6 Engaging portion 10 Diaphragm holder 10a1 Hole portion 12 Pump chamber 13 Virtual line 14 Center line

Claims (9)

A pump chamber, a diaphragm disposed in the pump chamber, a driving member that drives the diaphragm, and an actuator having a shaft that operates the driving member, and suction of fluid into the pump chamber by driving the diaphragm And discharging the fluid from the pump chamber,
A suction path that extends in a direction orthogonal to the direction of movement of the shaft of the actuator, guides the fluid to the pump chamber, and a discharge path that guides the fluid in the pump chamber to the outside;
And a valve body provided in association with each of the suction passage and the discharge passage. In the invention of claim 1,
The pump according to claim 1, wherein the driving member and the main part of the diaphragm are arranged so as to be biased to one side around the axis of the actuator. In the invention according to claim 1 or 2,
The pump, wherein the valve body includes a first check valve that opens and closes the suction passage, and a second check valve provided between the pump chamber and the discharge passage. In the invention of claim 3,
Each of the first check valve and the second check valve has a movable umbrella part and a shaft part provided in a direction orthogonal to the expanding direction of the umbrella part,
The shaft portion of the first check valve is extended in a direction perpendicular to the moving direction of the shaft of the actuator in parallel to the suction path, and the shaft portion of the second check valve is extended to the actuator. A pump characterized by extending in an oblique direction with respect to the moving direction of the shaft. In the invention of claim 4,
A valve holder for holding the second check valve and forming the pump chamber;
A first flow path that extends in a direction orthogonal to the direction of movement of the shaft of the actuator, and that connects the suction path and the pump chamber via the first check valve; and the actuator. A second passage that extends in an oblique direction with respect to the moving direction of the shaft and communicates the discharge passage and the pump chamber via the second check valve,
The pump characterized in that the second check valve is provided so that the second flow path of the valve holder can be opened and closed. In the invention of claim 5,
The valve holder is
A first flat plate portion disposed at a position away from the suction passage; a second flat plate portion disposed at a position close to the suction passage and spaced from the first flat plate portion; and the second check valve. The shaft portion is held, and has an inclined portion connecting the first flat plate portion and the second flat plate portion,
The first channel is formed in the second flat plate portion, the second channel is formed in the inclined portion,
A case in which the suction passage and the discharge passage are formed and the shaft portion of the first check valve is held;
The umbrella portion of the first check valve has a flat portion that contacts the second flat plate portion of the valve holder, and the umbrella portion of the second check valve has a flat portion that contacts the case. Features a pump. In the invention of claim 1,
The diaphragm has two ends located on opposite sides that are held when arranged in the pump chamber,
An imaginary line connecting the first end which is one end of these two ends and the second end which is the other end is inclined with respect to the moving direction of the shaft of the actuator. Thus, the pump characterized by providing the said diaphragm. In the invention of claim 1,
A pump characterized in that the drive member is formed integrally with the shaft of the actuator. In the invention of claim 1,
A pump comprising a diaphragm holder that forms the pump chamber and accommodates the diaphragm, and the diaphragm holder is provided with a hole into which the driving member is movably inserted.

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